Seat and bed frames rotating in relation to the variable-setting back

Abstract: Sofa, bed or similar provided of bed frames (1) variable-setting back (2), and comprising a device for coupling the seat frame (1) together with legs (6,7,8) and back set (2) and made up of a plate (3) having a seat (3a) or the rotational coupling with the seat frame (1) and a coaxial pivot (3b) insertable into a bush (4) integral with a radial structure (5) fixed with the supporting legs (6,7,8), there being also provided restraining means (10), integral with the seat frame (1) for the stability of the position reached, said combination allowing to seat frame (1) and back (2) to assume a wide variety of positions, through rotation of the seat frame in relation to the back set (2) or through moving of the back set in relation to the seat frame.

Description: It is object of the present patent a seat bed frames or similar, whether involving upholstered or non-upholstered units, having seat frame joined to a mechanical device that enables the seat frame to assume different positions in relation to the back, or the back in relation to the seat frame, this being achieved by the reciprocal rotation thereof and in respect to the supporting legs. Furthermore, the same supporting structure make it possible to benefit from two types of back of variable setting and with a fixed body, located in a straight line in one case and at an angle in the other case. As will become more clearly apparent later, the whole allows a wider variety of connections between the two types of units and is such as to make possible to obtain different combinations of the same. From DE-U-89 01 762 it is known in the art to modify the relative position of the back in respect of the seat through seats hold fixed and backrest rotating around the seat itself. According to the present invention the problem is solved by a sofa, bed or similar according to the characterizing part of claim 1. A description of the invention is now given with reference to the attached drawings in which: In fig. 1 is illustrated, albeit in a schematic manner a view of the underside of the sofa seat or bed frame in a possible form of implementation of the invention according to the version, with the fixed part of the back set in a straight line; in fig. 2 the longitudinal section of fig. 1; in figg. 3 and 4: is shown the unit, in an upholstered version, seen from the front (fig.3) and in plan view (fig.4), with dotted outlines in two positions between those which may be assumed by seat frame (1) in relation to back (2) and the various settings capable of being attained by such back (2); in figg. 5 and 6: is shown a different configuration of the sofa according to the invention seen from the bottom and according to a longitudinal section respectively; in figg. 7 and 8: are shown views of different configuration of the sofa of fig. 5 and 6; in figures from 9 to 19 are illustrated other arrangements of the different parts of the sofa. In fig. 1 is shown the seat frame 1 supported at one end by normal legs 101, for leaning to the floor, and at the other end by a radial structure 5 constrained to the supporting legs 6, 7, 8. The radial structure 5 is integral with the seat frame through a device allowing the reciprocal movement of seat frame 1 and back set 2. The device consists of a place 3 with a pivot 3a which engages a bush 4, made integral with radial structure 5 connected to three legs 6, 7 and 8. The plate 3 is further provided with a seat 3b, coaxial with the pivot 3a, into which a corresponding pin lb of the seat frame 1 enters. In such way the radial structure 5 and the plate 3 are fixed while the seat frame 1 can rotate relatively to the plate 3 itself whose upper surface can present a finishing with low coefficient of friction to facilitate the rotation itself. Legs 6 and 7 are located outside the area of the seat frame 1, they are tubular and are such as to allow the insertion of pins 9 of the back 2 for the fixing thereof to such legs. Back (2) remains in rectilinear setting in its middle part, while end parts 2' and 2'' may rotate through 90 degrees in both directions. This is made possible by the presence of known internal hinges for the attachment of the end parts to the middle part. The restraining device (10) integral to the seat frame 1 imparts stability to the structure once it has assumed the desired position. In the example given in figg. 5 and 6 it is the radial structure 5, integral with back 2, which remains fixed, whereas it is the seat frame 1 which undergoes movement. Nothing prevents the opposite from occurring, it being sufficient for this purpose to modify the supports 6, 7, 8 of the seat frame 1, there remaining unchanged the ultimate aim of the disposition. Fig. 5, 6, 7 and 8 reproduce the same situation as in the drawings described above, with the sole difference that reference is made to the version corresponding to the back with its fixed part at an angle. In this case all three legs 6, 7 and 8 are located outside the perimeter of the seat frame 1 and serve for the attachment of back 2 to the legs integral with the radial structure 5. In figures from 9 to 19 are shown some combinations of possible dispositions of the back set, having different shapes, with seat frame under different positions.

Claims: Sofa, bed or similar comprising a seat frame (1) and a variable-setting back (2) with a device for coupling the seat frame (1) with supporting legs (6, 7, 8) and the back (2) and being made up of a plate (3) having a seat (3b) for rotational coupling with a pin (1b) of the seat frame (1) and a coaxial pivot (3a) insertable into a bush (4) wherein said bush is integral with a radial structure (5) fixed with the supporting legs (6, 7, 8), the upper end of said legs being provided with vertical seats for axial coupling with pins (9) projecting from the back (2) there being also provided restraining means (10), integral with said seat frame (1) for the stability of the position reached, said combination allowing said seat frame (1) and back (2) to assume a wide variety of positions, through rotation of the seat frame in relation to the back (2). Sofa, bed or similar according to claim 1 characterized in that said restraining means (10) comprises a frictional element integral to the seat frame (1) drivable by outside in a radial direction in relation to the fixed plate (3). Sofa, bed or similar according to claim 1 characterized in that the relevant backs (2) are of variable setting with a fixed rectilinear middle part and end parts (2',2'') rotating through 90 degrees. Sofa, bed or similar according to claim 1 characterized in that the relevant variable-setting backs have a fixed middle part at right angles and end parts (2',2'') rotating through 90 degrees.

Inventors: BINFARE FRANCESCO, BINFARE', FRANCESCO
Applicants: EDRA SPA, EDRA S.P.A.
Application year: 1994
Main classification: A47C17
IPC codes: A47C17